Please use this identifier to cite or link to this item: http://hdl.handle.net/11452/21127
Title: Effect of maturity stage on chemical composition, in vitro and in situ dry matter degradation of tumbleweed hay (Gundelia tournefortii L.)
Authors: Kamalak, Adem
Gürbüz, Yavuz
Erol, Adem
Özay, Osman
Bursa Uludağ Üniversitesi/Ziraat Fakültesi/Hayvan Besleme Bölümü.
Canbolat, Önder
Keywords: Tumbleweed hay
Gas production
Maturity stage
In situ degradation
Nylon bag degradability
Incubation
Gas-production
Nutritive evaluation
Rumen
Digestibility
Forages
Fiber
Agriculture
Issue Date: May-2005
Publisher: Elsevier Science BV
Citation: Kamalak, A. vd. (2005). "Effect of maturity stage on chemical composition, in vitro and in situ dry matter degradation of tumbleweed hay (Gundelia tournefortii L.)". Small Ruminant Research, 58(2), 149-156.
Abstract: The nutritive values of tumbleweed (Gundelia tournefortii L.) hays harvested at three stages were evaluated by chemical composition, in vitro (gas production) and in situ dry matter degradation methods. Gas production or dry matter (DM) degradation were calculated at 0, 3, 6, 12, 24, 48, 72 and 96 h and their kinetics were described using the equation p = a + b (1 - e(ct)). Maturity had a significant effect on both the chemical composition and degradability of tumbleweed hay. Neutral detergent fibre (NDF), acid detergent fibre (ADF) and ether extract (EE) increased with increasing maturity whereas the crude protein (CP) and ash content decreased. The gas produced after 96 h incubation ranged between 66.33 and 76.67 ml per 0.200 g of dry matter. The gas production (ml) at all incubation times and estimated parameters decreased with increasing maturity of tumbleweed hay. The gas production at all incubation times and estimated parameters (c, a, organic dry matter digestibility (OMD), metabolizable energy (ME)) were negatively correlated with NDF and ADF. The DM disappearance after 96 h incubation ranged between 56.19 and 72.77%. The in situ DM disappearance at all incubation times and estimated parameters decreased with increasing maturity of tumbleweed hay. The in situ dry matter disappearance at all incubation times and estimated parameters (c, a, b and effective dry matter degradability (P)) were negatively correlated with NDF, ADF and EE but positively correlated with CP and ash content. There were significant correlations between in vitro gas production and in situ DM disappearance at all incubation times. The nutritive value of tumbleweeds continually changed as it matures. Tumbleweeds, harvested at the proper stage of maturity offers considerable potential as a high quality forage for ruminant during winter feeding period. (c) 2004 Elsevier B.V. All rights reserved.
URI: https://doi.org/10.1016/j.smallrumres.2004.09.011
https://www.sciencedirect.com/science/article/pii/S0921448804002457
http://hdl.handle.net/11452/21127
ISSN: 0921-4488
Appears in Collections:Web of Science

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